I bought Dark Toffee Blonde and used it with Fudge Catalyst developer 9%. I had light brown hair with a copper tone that had faded out quite alot and regrowth of lots of grey hair. I used 20ml of colour with 15ml developer and 15ml water on the roots and then 1:1.5 on the rest of the hair and it turned out great. Full grey coverage and excellent colour intensity, alot darker than I thought it would be but I think it will fade nicely. This was my first time using Fudge colour and I'm very happy with it and love saving money by not going to a hairdresser and still getting professional results. It smells nice too.